Power loss between 5000 and 6000 rpm

[TristanLeon20VT]

Last weekend I did an VAG-COM test iwth my Leon and it shows that the Airmass is falling between 5 en 6000 rpm. Boost was alright (1,54 Bar max).

Horsepower:


Boost 1:


Boost 2 Atctual vs Spec:


Boost 3: Actual vs Spec:


The Airmass falling down to +/- 135 g/s. I thinks it's that damn MAF-sensor again, but I'm not so sure.

I only get like 220 hp, what normaly will be around 240 hp. Anyone a guess what the problem wil be?

Thanks in advance.

 

[petay_pan]

not sure so someone correct me but I thought this is just what smaller turbos do at the end of the rev range as they just can't sustain the boost pressure at the rate the cylinders are needing to burn it.

 

[TristanLeon20VT]

not sure so someone correct me but I thought this is just what smaller turbos do at the end of the rev range as they just can't sustain the boost pressure at the rate the cylinders are needing to burn it.

Yes correct, but the airmass was decreasing a lot between 5K en 6K rpm. I've installed a new MAF-sensor, but still in 5th and 6th gear at 5K rpm, you feel the car is struggling, you feel the power loss. Normaly is quite lineair.